Tiebar and spacer



Patented Nov. 21, 119221 J.- P. JACKSON. TIE BAR AN D SPACER. APPLICAT ION FILED DEC.23. I920. RENEWED APR. 29; 1922. 1,436,345.

i atented Nov. 21, 1922.

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AMA '3 ear TIEBAR awn srnonn.

Application filedDecember 23, 1920, Serial No. 432,765. Renewed April 29, 1922. Serial No. 557,422.

in tie-bars and spacers for side plates of molds or forms, such as are used in constructing walls of cement, concrete or other plastic, A; tie-bar and spacer made to accord with my invention is adapted to be used to connect and space forms, which may be either of wood or metal, to hold the frames or plates spaced apart and connected, the space between the plates being filled with concrete which also surrounds the tiebar and spacer, rendering removal thereof difficult and when removed by hammering the wall is liable to be injured, by being jarred before the concrete becomes fully hardened. l

The object of my invention is to provide a tie-bar and spacer for molds or forms that is held in place by wedges or keys which engage the ends of the tie-bars and the outer faces of the mold or mold plates, either directly or indirectly, and to provide the portion of the tie-bar between the moldplates with integral arched members which incase such intermediate portion of the tiebar and serves as spacing members, each of said spacing members having the ends and one edge unrestrained, whereby, after removal of the wedges and the sides of the mold or form the tie-bar and spacer may be readily removed from the concrete or cement, by simply pulling upon one end thereof, and in case the resistance against withdrawal is such as is likely to affect the wall injuriously the spacing members may be reduced in diameter by twistingv a projecting end of the tie-bar. y

A further object of my invention is to provide a longitudinally tapered tie-bar and spacer the spacing members being of such configuration that pressure against end portions thereof will increase the curvatures or areas of the arched encasing portions that form the spacer, and when the pressure is released the encasing portions will return to normal area, so as to be readily removable from the cement wall or structure.

A further object of my invention is to provide a tie-bar and spacer, the central portion having extended ends provided with apertures, and arched members which ex tend from the side-edges and encase an intermed ate portion of the tie-bar, the arched members being of such character and form that when subjected to strain or stress the circumferential areas thereof may be varied,

and to provide a tie-bar with transversely curved encasing members that are integral Itherewith and extend from opposite sides thereof to provide encasing members for an intermediate portion of the tie-bar and means for stiffening the same.

lVith the above and other objects in view my invention consists in the novel features of construction, formation, combination and arrangement of parts to be hereinafter more particularly described, claimed and illustrated in the accompanying drawings in WlllCll-. i

Figure l, is a plan view of a blank from which a tapered tie-bar and spacer may be produced by bending. Fig. 2, is a side elevation of a tie-bar and spacer, made from a blank as shown by Fig. 1, the mold-plates being in section. Fig. 3, is an end view, looking toward the larger end of the tiebar and spacer. Fig. 4., is an end view of a slightly modified form. Fig. 5, is plan view of an end portion of the tie-bar and spacer showing the same as in use with a block or washer. Fig, 6, is a View showing the inner face of the block or washer. Fig. 7, is a side view showing one end of the tie-bar and spacer as used with wooden may be used with either metal or wooden molds or forms, when the tie-bar and spacer is made with ends of the spacing and encasing members without pitch or inclination. lindrical tie-bar and spacer, the broken lines showing the part from which a spacing member is formed by being projected there from, and Fig. 10, is a plan view of a tiebar and spacer constructed to maintain inner mold-plates used in constructing hollow walls.

Figure l of the drawings illustrates a blank, the perimeter being in full lines and indicating the shape of apiece of sheet metal that may be formed into a tie-bar and spacer that accords with my invention. The broken line aa, has reference to the longitudinal center of the blank; the portion in- Fig) 9, is a side elevation of a cyplates. The outer longitudinal edges of the "blank diverge or are 'angularly disposed relative to the longitudinal center of the blank. The ends of the blanks are preferably 'formed'yvith a'suitable pitch, and the sides vvhen circumfiexed form arched seg- 'ments their longitudinal edges overlapping.

Theend portions of the encasing members whichlie adjacent to the longitudinal bends 'will' project and the opposite ends recede, so that pressure applied against the projecting portion or adjacent to the ends furthest from the bends will result in an increase of the arcs of the circumflexed side portions. The parallel broken lines c0 indicate where slots may be formed through the side members of the blank, to provide means for s pacing inner mold-plates used in constructing stantially "parallelyandpressure is applied hollow walls. The extensionsatthe oppositeends of-the tapered portion of the blank may be of the same width or of a'width -equal-to the ends of the tapered portion,

such end s having therethrough wedge or key receiving slots, thetapered portion and the end extensions togetherconstitute 'the tie-bar. 'In the manufacture of the tie -bars and spacers I use sheet metal of suitable thickness and "resiliency, and the scraps from theblanks which otherwise might be con-' sidered as waste maybe used to form wedges or 'tapered'keys.

so that the circumflcxed encasing portions Band 14 have pitched ends that are subto bring'the edges in'line, there results anincrease of the dlametrical areas of the c1rcurnflexed encasing portions 13 and 14 while under such stress or strain which is exerted "thefencircling members 13 and 14 will be provided with openings -19,to receive inner against the endsby the mold-plates which are'drawn toward each other by thewedges, and whenthe pressure is relieved, by removing the wedges, the circumference of the encasing members is automatically reduced,

ft-he center portion that constitutes the tiebar being rigid and the spacing members resilient. p The construction of the parts are such'that when pressure exerted against the arched endsof the spacing members isrelleved by removal of the Wedges, mold-plates, and

spacing blocks or washers when used, there ill'be a corresponding reduction of the area of the spacing member's.

A diminution of the circumferential areas of the circumflexed encasing members may be effected by turning" or twisting an "end of the tie-bar, and by simultaneously pushingor pulling the same a removal of the tie-bargand spacer from the-wall is effected. The several forms of tie-bars and spacers illustrated may be turned in an opposite direction irom'vthat which they are turned and the material reained away will be forced into 'thespaces betweenlthe septum and the encasing members.

A'tije bar and spacer made 111 one piece from"'a'fblan k" as shown by Figure 1, com- 11 prises a longitudinallytapered portion 12, 'circumflexed" exterior portions 13 and 14:

thatencasethe septumlQ, the longitudinal [edges ofthe parts 13 and 14 extending beyond and overlying the bends 15, as shown "by Fi s. 8 and f the drawings. The bends or deiormations '15 maybe as shown by Fig.

4, inwhich instance the encasing members have their freeedgesin line circumferen- "tially and therecesses provide spaces for movemen'tof the encasing'members, such rejcesses merging into inclined surfaces upon wvl icli" the freeedges'of the segments 13 and "1 1 finay ride orpressfwhen it is desired to project the"free' edges to ream or shearaway aportion of the concrete to severits adherence'with the enca'sing members.

Theen'd portions 16 of the septum 12 which extend {beyond the ends of the encasing m'ernbers13 and 1 1 are eaehpreferably providedwith 'p arallelsl0ts 17 for the re- VVhen the tie-bar and spaceris constructed the endp'ortionsb'eing thesame as thewidth "oftheends of the' septum #12 or of equal .cepti'on of keys or wedgesflS, the width of width, and the length of the slots are such {as to ex'tend to. points beyond the ends of the 'encasing members. j hen the t1e-bar and'spacer 1s used'in the construction of hollow or spaced apart walls mold p-late s'20,-as shown byFig. 10, and

' preferably the openings-19 do not extend "either to the longitudinal edges of the sepa ra 12 nor to theedges ofthe circumflexed encasinglportionsthe openings being formed and spaced away therefrom so as notto materially weaken the arched members to such an extenttl at' they would be likely to buckle under pressure.

"'To recess and increase the thickness of the spacing masters; the bottomof the recess beingwith or without pitched surf-aces, de-

pendingupon the' conformation 01" the ends of the spacing members, as when they do not have pitched ends the recess or the inner face of the block or washer will provide the inclined surfaces.

In use with wooden molds or forms a tiebar and spacer made to accord with my invention is used with washers or plates 23, as shown by Fig. 7, having therethrough slots for the passage of the slotted ends 16 that extend beyond the septums 12, and when the ends of the encasing members are not spiral or pitched the washers 23 will be formed with suitable projecting portions in for engagement with the ends of such members, for the purpose set forth. The projections 24 may be made by stamping or swedging the projections from the metal, as such method of construction will provide projections on one face and depressions on the opposite side, for use on opposite ends of the tie-bar and spacer whether the same be tapered or cylindrical. The ends of the tie bar may have a single centrally located wedge receiving slot, though parallel slots are preferable as the wedges may engage adjacent plates, and the use of external mold connecting plates are unnecessary.

Fig. 9, shows a tie-bar and spacer of cylindrical form, and in broken lines one of the encasing members prior to being bent in shape. The edges at the ends of the encasing members may be at right angles to the parallel sides of the encased portion, for use with means for engagement with the free ends of the encasing members at one end when desired, or angular to the sides of the septum so that one of the ends thereof will extend beyond the end of the encasing member that it overlaps.

It will be noted that the tie-bar and spacer made to accord with my invention is characterized by an entire absence of screwthreads, nuts and the like, that it is formed in one piece and is adapted for reuse. When tapered apertures are formed in the wall they are adapted to receive and retain tapered plugs of wood to which may be nailed furring strips or other parts of the building.

The holes formed through the walls may be readily filled with concrete by working from the larger ends, and in some instances it may be desirable to let the tie-bars and spacers remain in the wall, as to provide openings for ventilation, and in such case the slotted ends may be bent in opposite directions, and when so bent the openings will permit a circulation of air but will not permit the entrance of rodents.

I claim:

1. A tie-bar and spacer comprising a diametric central member and oppositely disposed circumflexed members of less length than the diametric central member the latter encasing a portion of the central member.

2. A tie-bar and spacer compising a fiat septum and resilient encasing members which are integral therewith.

3. A tie-bar and spacer comprising a centrally disposed member having apertured end portions and arched members sprung from and integral with the central member, the arched members encasing a. part of the central member and overlapping each other.

4. A mold clamp for concrete work, comprising a tie-bar and integral arched members which encase a major portion of the tie-bar and provide spacing members.

5. A one piece tie-bar, and spacer for mold-plates used for concrete work comprising a central fiat member provided with apertures adjacent to the ends for the reception of wedges, encasing portions that en circle a part of the flat member the same being sprung from opposite edges of said flat member and of such area that they will extend beyond the opposite edges from which they are sprung.

6. In a tie-bar and spacer for molds used in concrete work a fiat member, arched encasing members integral therewith and intervening bends from which the encasing members spring and extend for a distance suflicient to overlie the bend between the fiat member and the opposite encasing member.

7. A tie-bar and spacer comprising a septum, arched encasing members and intervening bends which impart rigidity to the septum and from which the encasing members spring.

8. A tie-bar and spacer made of a single piece of sheet metal provided with a flat longitudinal portion and encasing members which extend therefrom, said encasing members being of arched formation and of such resiliency that the diametrical diameters thereof may be reduced by a torsional stress applied to the flat longitudinal portion.

9. A tie-bar and spacer comprising a tapered flat encased portion and tapered encasing portions which are integral with the portion that they encase.

10. A tie-bar and spacer comprising a longitudinally tapered septum to the opposite sides of which are acute bends from which spring arched encasing members the longitudinal edges of said encasing members extending beyond the sides of the septum from which they spring.

11. A tie-bar and spacer comprising a flat diametrical portion having side extensions which are oppositely circumflexed to encase a part of the diametric portion of the tie-bar the ends of the circumflexed portions being spiral.

12. A tie-bar and spacer comprising a longitudinally tapered member provided with slotted end portions, and integral encasing members of arched formation which are of ill less length than the member which they -encase such encasing members having" ends diiierent diameters when circumflexed and of such circumferential area that the encasine' members which ta 361 lon tudinall c: b

the arched ends being pitched to be subjected tostrain or pressure which tends to increase the area of the encasing members.

14. A tie-bar and spacer, comprising a sheet metal unit which is shaped to provide a flat diametric portion and circumflexed members of less length than the diametric portion said circumflexed members being provided between their ends with openings for inner mold plates.

15. In combination with a tie-bar and spacer-,a washer or apertured plate that is adapted to be mounted upon the tie-bar and to be engaged by the arched ends of the spacing members. i

16. In combination with a tie-bar and spacer havinga flat central portion and 'integral enca'sing members having archedends, of a washer --having offset portions forengagement with ends of the 'encasing members for the purpose set forth.

17.1n combination with a tie bar and spacer for use in concrete Work, a tie-bar as to'extend 'beyt-nd the septum and to have their tree edges parallel therewith, the

arched end )ortions of 'the'encasin memhers engaging mold-plates, for the purpose set forth.

18. A tie-bar and spacertormed from a single blank of sheet metal the blank being bent to provide a flat central portion and semi-tubular circumflexed encaslng portions of less length than the central portion and openings formed through the ends ot the flat portion for the reception of Wedges.

JOHN P. JACKSON. 

